Set up a test

generate/example_test.go

@@ -0,0 +1,39 @@
+package generate
+
+import (
+	"bytes"
+	"io/ioutil"
+	"path/filepath"
+	"runtime"
+	"testing"
+)
+
+func TestGenerateExample(t *testing.T) {
+	_, thisFile, _, ok := runtime.Caller(0)
+	if !ok {
+		t.Fatal("runtime.Caller non-ok")
+	}
+
+	repoRoot := filepath.Dir(filepath.Dir(thisFile))
+	configFilename := filepath.Join(repoRoot, "example/genql.yaml")
+	config, err := ReadAndValidateConfig(configFilename)
+	if err != nil {
+		t.Fatal(err)
+	}
+
+	code, err := Generate(config)
+	if err != nil {
+		t.Fatal(err)
+	}
+
+	expectedCode, err := ioutil.ReadFile(config.Generated)
+	if err != nil {
+		t.Fatal(err)
+	}
+
+	if !bytes.Equal(code, expectedCode) {
+		t.Errorf(
+			"diffs to generated code:\n---actual---\n%v\n---expected---\n%v",
+			string(code), string(expectedCode))
+	}
+}