How to use the jasmine.expect function in jasmine

element(by.css('div[row="0"] div[colid="mood"] img')).getAttribute("src").then((src) => {
                                                expect(src).toEqual("http://localhost:8080/images/smiley-sad.png");
                                            });
                                        });

element(by.css('div[row="2"] div[colid="params')).getText().then((text) => {
                    expect(text).toEqual("Field: row, Value: Row 2");
                });
            });

element(by.css('div[row="0"] div[colid="mood"] img')).getAttribute("src").then((src) => {
                    expect(src).toEqual("http://localhost:8080/images/smiley.png");
                });
            })

element(by.css('div[row="0"] div[colid="row')).getText().then((text) => {
                    expect(text).toEqual("Row 0");
                });
            })