Automate testing of the examples directory

examples/examples_test.go

@@ -0,0 +1,53 @@
+package examples_test
+
+import (
+	"embed"
+	"fmt"
+	"testing"
+
+	"code.betamike.com/mediocregopher/ginger/gg"
+	"code.betamike.com/mediocregopher/ginger/vm"
+	"github.com/stretchr/testify/assert"
+)
+
+//go:embed *.gg
+var examplesFS embed.FS
+
+func TestAllExamples(t *testing.T) {
+
+	tests := []struct {
+		path string
+		in   vm.Value
+		exp  vm.Value
+	}{
+		{
+			path: "fib.gg",
+			in:   vm.Value{Value: gg.Number(5)},
+			exp:  vm.Value{Value: gg.Number(5)},
+		},
+		{
+			path: "fib.gg",
+			in:   vm.Value{Value: gg.Number(10)},
+			exp:  vm.Value{Value: gg.Number(55)},
+		},
+		{
+			path: "fib.gg",
+			in:   vm.Value{Value: gg.Number(69)},
+			exp:  vm.Value{Value: gg.Number(117669030460994)},
+		},
+	}
+
+	for _, test := range tests {
+		t.Run(fmt.Sprintf("%s_%v", test.path, test.in), func(t *testing.T) {
+			f, err := examplesFS.Open(test.path)
+			if err != nil {
+				t.Fatal(err)
+			}
+			defer f.Close()
+
+			got, err := vm.EvaluateSource(f, test.in, vm.GlobalScope)
+			assert.NoError(t, err)
+			assert.True(t, test.exp.Equal(got), "%v != %v", test.exp, got)
+		})
+	}
+}