A modern programming language that makes developers happier.

kotlinlang

so, if you guy swill allow me to do a bit of kotlin show and tell, I created this little DSL for testing in about an hour:
```
    @Test fun `when importing a sheet with points that are not in bounds should properly import`() = runTest (
            document = """x1,x2,f1
                         |1,2,3
                         |1,2,4
                         |""".trimMargin(),
            expectedErrors = setOf(
                    MatrixImportError("Bounds no good!")
            ),
            expectedMatrix = matrixBuilder.optimization {
                columns() ["x1",        "x2",       "f1"        ]
                bounds()  [0.0..3.0,    0.0..3.0,   `-∞`..`+∞` ]
                point()   [1.0,         2.0,        3.0         ]
                point()   [1.0,         5.0,        4.0         ]
            }
    )
```