chore: migrate deploy_test to integration tests in buildengine

This tests the same things as the old test, but through slightly higher abstraction layer (cli instead of calling build engine functions directly)

internal/buildengine/deploy_integration_test.go

@@ -0,0 +1,23 @@
+//go:build integration
+
+package buildengine
+
+import (
+	"testing"
+
+	in "github.com/TBD54566975/ftl/internal/integration"
+)
+
+func TestDeploy(t *testing.T) {
+	in.Run(t,
+		in.WithTestDataDir("testdata"),
+		in.CopyModule("another"),
+
+		// Build first to make sure the files are there.
+		in.Build("another"),
+		in.FileExists("/another/.ftl/main"),
+
+		// Test that the deployment works and starts correctly
+		in.Deploy("another"),
+	)
+}

internal/integration/harness.go

@@ -59,6 +59,15 @@ func WithLanguages(languages ...string) Option {
 	}
 }
 
+// WithTestDataDir sets the directory from which to look for test data.
+//
+// Defaults to "testdata/<language>" if not provided.
+func WithTestDataDir(dir string) Option {
+	return func(o *options) {
+		o.testDataDir = dir
+	}
+}
+
 // WithFTLConfig is a Run* option that specifies the FTL config to use.
 //
 // This will set FTL_CONFIG for this test, then pass in the relative
@@ -97,6 +106,7 @@ func WithoutController() Option {
 
 type options struct {
 	languages       []string
+	testDataDir     string
 	ftlConfigPath   string
 	startController bool
 	requireJava     bool
@@ -176,10 +186,15 @@ func run(t *testing.T, actionsOrOptions ...ActionOrOption) {
 				ctx = startProcess(ctx, t, filepath.Join(binDir, "ftl"), "serve", "--recreate")
 			}
 
+			testData := filepath.Join(cwd, "testdata", language)
+			if opts.testDataDir != "" {
+				testData = opts.testDataDir
+			}
+
 			ic := TestContext{
 				Context:  ctx,
 				RootDir:  rootDir,
-				testData: filepath.Join(cwd, "testdata", language),
+				testData: testData,
 				workDir:  tmpDir,
 				binDir:   binDir,
 				Verbs:    verbs,