loopback-datasource-juggler/test/discovery.test.js

var jdb = require('../');
var DataSource = jdb.DataSource;
var should = require('./init.js');

describe('Memory connector with mocked discovery', function() {
  var ds;

  before(function() {
    ds = new DataSource({connector: 'memory'});

    var models = [{type: 'table', name: 'CUSTOMER', owner: 'STRONGLOOP'},
      {type: 'table', name: 'INVENTORY', owner: 'STRONGLOOP'},
      {type: 'table', name: 'LOCATION', owner: 'STRONGLOOP'}];

    ds.discoverModelDefinitions = function(options, cb) {
      process.nextTick(function() {
        cb(null, models);
      });
    };

    var modelProperties = [{
      owner: 'STRONGLOOP',
      tableName: 'INVENTORY',
      columnName: 'PRODUCT_ID',
      dataType: 'varchar',
      dataLength: 20,
      dataPrecision: null,
      dataScale: null,
      nullable: 0
    },
      {
        owner: 'STRONGLOOP',
        tableName: 'INVENTORY',
        columnName: 'LOCATION_ID',
        dataType: 'varchar',
        dataLength: 20,
        dataPrecision: null,
        dataScale: null,
        nullable: 0
      },
      {
        owner: 'STRONGLOOP',
        tableName: 'INVENTORY',
        columnName: 'AVAILABLE',
        dataType: 'int',
        dataLength: null,
        dataPrecision: 10,
        dataScale: 0,
        nullable: 1
      },
      {
        owner: 'STRONGLOOP',
        tableName: 'INVENTORY',
        columnName: 'TOTAL',
        dataType: 'int',
        dataLength: null,
        dataPrecision: 10,
        dataScale: 0,
        nullable: 1
      }];

    ds.discoverModelProperties = function(modelName, options, cb) {
      process.nextTick(function() {
        cb(null, modelProperties);
      });
    };
  });

  it('should convert table/column names to camel cases', function(done) {
    ds.discoverSchemas('INVENTORY', {}, function(err, schemas) {
      if (err) return done(err);
      schemas.should.have.property('STRONGLOOP.INVENTORY');
      var s = schemas['STRONGLOOP.INVENTORY'];
      s.name.should.be.eql('Inventory');
      Object.keys(s.properties).should.be.eql(
        ['productId', 'locationId', 'available', 'total']);
      done();
    });
  });

  it('should convert table/column names with custom mapper', function(done) {
    ds.discoverSchemas('INVENTORY', {
      nameMapper: function(type, name) {
        // Convert all names to lower case
        return name.toLowerCase();
      }
    }, function(err, schemas) {
      if (err) return done(err);
      schemas.should.have.property('STRONGLOOP.INVENTORY');
      var s = schemas['STRONGLOOP.INVENTORY'];
      s.name.should.be.eql('inventory');
      Object.keys(s.properties).should.be.eql(
        ['product_id', 'location_id', 'available', 'total']);
      done();
    });
  });

  it('should not convert table/column names with null custom mapper',
    function(done) {
      ds.discoverSchemas('INVENTORY', {nameMapper: null}, function(err, schemas) {
        if (err) return done(err);
        schemas.should.have.property('STRONGLOOP.INVENTORY');
        var s = schemas['STRONGLOOP.INVENTORY'];
        s.name.should.be.eql('INVENTORY');
        Object.keys(s.properties).should.be.eql(
          ['PRODUCT_ID', 'LOCATION_ID', 'AVAILABLE', 'TOTAL']);
        done();
      });
    });

  it('should honor connector\'s discoverSchemas implementation',
    function(done) {
      var models = {
        inventory: {
          product: {type: 'string'},
          location: {type: 'string'}
        }
      };
      ds.connector.discoverSchemas = function(modelName, options, cb) {
        process.nextTick(function() {
          cb(null, models);
        });
      };
      ds.discoverSchemas('INVENTORY', {nameMapper: null}, function(err, schemas) {
        if (err) return done(err);
        schemas.should.be.eql(models);
        done();
      });
    });

  it('should callback function, passed as options parameter',
    function(done) {
      var models = {
        inventory: {
          product: {type: 'string'},
          location: {type: 'string'}
        }
      };
      ds.connector.discoverSchemas = function(modelName, options, cb) {
        process.nextTick(function() {
          cb(null, models);
        });
      };

      var options = function(err, schemas) {
        if (err) return done(err);
        schemas.should.be.eql(models);
        done();
      };

      ds.discoverSchemas('INVENTORY', options);
    });

  it('should discover schemas using `discoverSchemas` - promise variant',
    function(done) {
      ds.connector.discoverSchemas = null;
      ds.discoverSchemas('INVENTORY', {})
      .then(function(schemas) {
        schemas.should.have.property('STRONGLOOP.INVENTORY');

        var s = schemas['STRONGLOOP.INVENTORY'];
        s.name.should.be.eql('Inventory');

        Object.keys(s.properties).should.be.eql(
          ['productId', 'locationId', 'available', 'total']
        );
        done();
      })
      .catch(function(err) {
        done(err);
      });
  });

  describe('discoverSchema', function(){
    var models;
    var schema;
    before(function() {
      schema = {
        name: 'Inventory',
        options: {
          idInjection: false,
          memory: { schema: 'STRONGLOOP', table: 'INVENTORY' }
        },
        properties: {
          available: {
            length: null,
            memory: {
              columnName: 'AVAILABLE',
              dataLength: null,
              dataPrecision: 10,
              dataScale: 0,
              dataType: 'int',
              nullable: 1
            },
            precision: 10,
            required: false,
            scale: 0,
            type: undefined
          },
          locationId: {
            length: 20,
            memory: {
              columnName: 'LOCATION_ID',
              dataLength: 20,
              dataPrecision: null,
              dataScale: null,
              dataType: 'varchar',
              nullable: 0
            },
            precision: null,
            required: true,
            scale: null,
            type: undefined
          },
          productId: {
            length: 20,
            memory: {
              columnName: 'PRODUCT_ID',
              dataLength: 20,
              dataPrecision: null,
              dataScale: null,
              dataType: 'varchar',
              nullable: 0
            },
            precision: null,
            required: true,
            scale: null,
            type: undefined
          },
          total: {
            length: null,
            memory: {
              columnName: 'TOTAL',
              dataLength: null,
              dataPrecision: 10,
              dataScale: 0,
              dataType: 'int',
              nullable: 1
            },
            precision: 10,
            required: false,
            scale: 0,
            type: undefined
          }
        }
      } ;
    });

    it('should discover schema using `discoverSchema`', function(done) {
      ds.discoverSchema('INVENTORY', {}, function(err, schemas) {
        if (err) return done(err);
        schemas.should.be.eql(schema);
        done();
      });
    });

    it('should callback function, passed as options parameter', function(done) {
      var options = function(err, schemas) {
        if (err) return done(err);
        schemas.should.be.eql(schema);
        done();
      };

      ds.discoverSchema('INVENTORY', options);
    });

    it('should discover schema using `discoverSchema` - promise variant', function(done) {
      ds.discoverSchema('INVENTORY', {})
        .then(function(schemas) {
          schemas.should.be.eql(schema);
          done();
        })
        .catch(function(err){
          done(err);
        });
    });
  });
});

describe('discoverModelDefinitions', function(){
  var ds;
  before(function(){
    ds = new DataSource({connector: 'memory'});

    var models = [{type: 'table', name: 'CUSTOMER', owner: 'STRONGLOOP'},
      {type: 'table', name: 'INVENTORY', owner: 'STRONGLOOP'},
      {type: 'table', name: 'LOCATION', owner: 'STRONGLOOP'}];

    ds.connector.discoverModelDefinitions = function(options, cb) {
      process.nextTick(function() {
        cb(null, models);
      });
    };
  });

  it('should discover model using `discoverModelDefinitions`', function(done) {
    ds.discoverModelDefinitions({}, function(err, schemas) {
      if (err) return done(err);

      var tableNames = schemas.map(function(s) {
        return s.name;
      });

      tableNames.should.be.eql(
        ["CUSTOMER", "INVENTORY", "LOCATION"]
      );
      done();
    });
  });

  it('should callback function, passed as options parameter', function(done) {
    var options = function(err, schemas) {
      if (err) return done(err);

      var tableNames = schemas.map(function(s) {
        return s.name;
      });

      tableNames.should.be.eql(
        ["CUSTOMER", "INVENTORY", "LOCATION"]
      );
      done();
    };

    ds.discoverModelDefinitions(options);
  });

  it('should discover model using `discoverModelDefinitions` - promise variant', function(done) {
    ds.discoverModelDefinitions({})
      .then(function(schemas) {
        var tableNames = schemas.map(function(s) {
          return s.name;
        });

        tableNames.should.be.eql(
          ["CUSTOMER", "INVENTORY", "LOCATION"]
        );
        done();
      })
    .catch(function(err){
      done(err);
    });
  });
});

describe('discoverModelProperties', function(){
  var ds;
  var modelProperties;
  before(function(){
    ds = new DataSource({connector: 'memory'});

    modelProperties = [{
      owner: 'STRONGLOOP',
      tableName: 'INVENTORY',
      columnName: 'PRODUCT_ID',
      dataType: 'varchar',
      dataLength: 20,
      dataPrecision: null,
      dataScale: null,
      nullable: 0
    },
      {
        owner: 'STRONGLOOP',
        tableName: 'INVENTORY',
        columnName: 'LOCATION_ID',
        dataType: 'varchar',
        dataLength: 20,
        dataPrecision: null,
        dataScale: null,
        nullable: 0
      },
      {
        owner: 'STRONGLOOP',
        tableName: 'INVENTORY',
        columnName: 'AVAILABLE',
        dataType: 'int',
        dataLength: null,
        dataPrecision: 10,
        dataScale: 0,
        nullable: 1
      },
      {
        owner: 'STRONGLOOP',
        tableName: 'INVENTORY',
        columnName: 'TOTAL',
        dataType: 'int',
        dataLength: null,
        dataPrecision: 10,
        dataScale: 0,
        nullable: 1
      }];

    ds.connector.discoverModelProperties = function(modelName, options, cb) {
      process.nextTick(function() {
        cb(null, modelProperties);
      });
    };
  });

  it('should callback function, passed as options parameter', function(done) {
    var options = function(err, schemas) {
        if (err) return done(err);

        schemas.should.be.eql(modelProperties);
        done();
      };

    ds.discoverModelProperties('INVENTORY', options);
  });

  it('should discover model metadata using `discoverModelProperties`', function(done) {
    ds.discoverModelProperties('INVENTORY', {}, function(err, schemas) {
      if (err) return done(err);

      schemas.should.be.eql(modelProperties);
      done();
    });
  });

  it('should discover model metadata using `discoverModelProperties` - promise variant', function(done) {
    ds.discoverModelProperties('INVENTORY', {})
      .then(function(schemas) {
        schemas.should.be.eql(modelProperties);
        done();
      })
    .catch(function(err){
      done(err);
    });
  });
});

describe('discoverPrimaryKeys', function(){
  var ds;
  var modelProperties;
  before(function(){
    ds = new DataSource({connector: 'memory'});

    primaryKeys = [
      { 
        owner: 'STRONGLOOP',
        tableName: 'INVENTORY',
        columnName: 'PRODUCT_ID',
        keySeq: 1,
        pkName: 'ID_PK' 
      }, 
      { 
        owner: 'STRONGLOOP',
        tableName: 'INVENTORY',
        columnName: 'LOCATION_ID',
        keySeq: 2,
        pkName: 'ID_PK' 
      }];

    ds.connector.discoverPrimaryKeys = function(modelName, options, cb) {
      process.nextTick(function() {
        cb(null, primaryKeys);
      });
    };
  });

  it('should discover primary key definitions using `discoverPrimaryKeys`', function(done) {
    ds.discoverPrimaryKeys('INVENTORY', {}, function(err, modelPrimaryKeys) {
      if (err) return done(err);

      modelPrimaryKeys.should.be.eql(primaryKeys);
      done();
    });
  });

  it('should callback function, passed as options parameter', function(done) {
    var options = function(err, modelPrimaryKeys) {
      if (err) return done(err);

      modelPrimaryKeys.should.be.eql(primaryKeys);
      done();
    };
    ds.discoverPrimaryKeys('INVENTORY', options);
  });

  it('should discover primary key definitions using `discoverPrimaryKeys` - promise variant', function(done) {
    ds.discoverPrimaryKeys('INVENTORY', {})
      .then(function(modelPrimaryKeys) {
        modelPrimaryKeys.should.be.eql(primaryKeys);
        done();
      })
      .catch(function(err){
        done(err);
      });
  });
});

describe('discoverForeignKeys', function(){
  var ds;
  var modelProperties;
  before(function(){
    ds = new DataSource({connector: 'memory'});

    foreignKeys = [{ 
      fkOwner: 'STRONGLOOP',
      fkName: 'PRODUCT_FK',
      fkTableName: 'INVENTORY',
      fkColumnName: 'PRODUCT_ID',
      keySeq: 1,
      pkOwner: 'STRONGLOOP',
      pkName: 'PRODUCT_PK',
      pkTableName: 'PRODUCT',
      pkColumnName: 'ID'
    }];

    ds.connector.discoverForeignKeys = function(modelName, options, cb) {
      process.nextTick(function() {
        cb(null, foreignKeys);
      });
    };
  });

  it('should discover foreign key definitions using `discoverForeignKeys`', function(done) {
    ds.discoverForeignKeys('INVENTORY', {}, function(err, modelForeignKeys) {
      if (err) return done(err);

      modelForeignKeys.should.be.eql(foreignKeys);
      done();
    });
  });

  it('should callback function, passed as options parameter', function(done) {
    var options = function(err, modelForeignKeys) {
      if (err) return done(err);

      modelForeignKeys.should.be.eql(foreignKeys);
      done();
    };

    ds.discoverForeignKeys('INVENTORY', options);
  });

  it('should discover foreign key definitions using `discoverForeignKeys` - promise variant', function(done) {
    ds.discoverForeignKeys('INVENTORY', {})
      .then(function(modelForeignKeys) {
        modelForeignKeys.should.be.eql(foreignKeys);
        done();
      })
      .catch(function(err){
        done(err);
      });
  });
});

describe('discoverExportedForeignKeys', function(){
  var ds;
  var modelProperties;
  before(function(){
    ds = new DataSource({connector: 'memory'});

    exportedForeignKeys = [{
      fkName: 'PRODUCT_FK',
      fkOwner: 'STRONGLOOP',
      fkTableName: 'INVENTORY',
      fkColumnName: 'PRODUCT_ID',
      keySeq: 1,
      pkName: 'PRODUCT_PK',
      pkOwner: 'STRONGLOOP',
      pkTableName: 'PRODUCT',
      pkColumnName: 'ID'
    }];

    ds.connector.discoverExportedForeignKeys = function(modelName, options, cb) {
      process.nextTick(function() {
        cb(null, exportedForeignKeys);
      });
    };
  });

  it('should discover foreign key definitions using `discoverExportedForeignKeys`', function(done) {
    ds.discoverExportedForeignKeys('INVENTORY', {}, function(err, modelForeignKeys) {
      if (err) return done(err);

      modelForeignKeys.should.be.eql(exportedForeignKeys);
      done();
    });
  });

  it('should callback function, passed as options parameter', function(done) {
    var options = function(err, modelForeignKeys) {
      if (err) return done(err);

      modelForeignKeys.should.be.eql(exportedForeignKeys);
      done();
    };

    ds.discoverExportedForeignKeys('INVENTORY', options);
  });

  it('should discover foreign key definitions using `discoverExportedForeignKeys` - promise variant', function(done) {
    ds.discoverExportedForeignKeys('INVENTORY', {})
      .then(function(modelForeignKeys) {
        modelForeignKeys.should.be.eql(exportedForeignKeys);
        done();
      })
      .catch(function(err){
        done(err);
      });
  });
});