build: download and compile with wasi-sdk

internal/crosscompile/crosscompile_test.go

@@ -0,0 +1,156 @@
+//go:build !llgo
+// +build !llgo
+
+package crosscompile
+
+import (
+	"os"
+	"runtime"
+	"testing"
+)
+
+const (
+	sysrootPrefix     = "--sysroot="
+	resourceDirPrefix = "-resource-dir="
+	includePrefix     = "-I"
+	libPrefix         = "-L"
+)
+
+func TestUseCrossCompileSDK(t *testing.T) {
+	// Skip long-running tests unless explicitly enabled
+	if testing.Short() {
+		t.Skip("Skipping test in short mode")
+	}
+
+	// Test cases
+	testCases := []struct {
+		name          string
+		goos          string
+		goarch        string
+		expectSDK     bool
+		expectCCFlags bool
+		expectCFlags  bool
+		expectLDFlags bool
+	}{
+		{
+			name:          "Same Platform",
+			goos:          runtime.GOOS,
+			goarch:        runtime.GOARCH,
+			expectSDK:     false,
+			expectCCFlags: false,
+			expectCFlags:  false,
+			expectLDFlags: false,
+		},
+		{
+			name:          "WASM Target",
+			goos:          "wasip1",
+			goarch:        "wasm",
+			expectSDK:     true,
+			expectCCFlags: true,
+			expectCFlags:  true,
+			expectLDFlags: true,
+		},
+		{
+			name:          "Unsupported Target",
+			goos:          "windows",
+			goarch:        "amd64",
+			expectSDK:     false,
+			expectCCFlags: false,
+			expectCFlags:  false,
+			expectLDFlags: false,
+		},
+	}
+
+	// Create a temporary directory for the cache
+	tempDir, err := os.MkdirTemp("", "crosscompile_test")
+	if err != nil {
+		t.Fatalf("Failed to create temp dir: %v", err)
+	}
+	defer os.RemoveAll(tempDir)
+
+	// Set environment variable for cache directory
+	oldEnv := os.Getenv("LLGO_CACHE_DIR")
+	os.Setenv("LLGO_CACHE_DIR", tempDir)
+	defer os.Setenv("LLGO_CACHE_DIR", oldEnv)
+
+	for _, tc := range testCases {
+		t.Run(tc.name, func(t *testing.T) {
+			export, err := UseCrossCompileSDK(tc.goos, tc.goarch)
+
+			if err != nil {
+				t.Fatalf("Unexpected error: %v", err)
+			}
+			t.Logf("export: %+v", export)
+
+			if tc.expectSDK {
+				// Check if flags are set correctly
+				if tc.expectCCFlags && len(export.CCFLAGS) == 0 {
+					t.Error("Expected CCFLAGS to be set, but they are empty")
+				}
+
+				if tc.expectCFlags && len(export.CFLAGS) == 0 {
+					t.Error("Expected CFLAGS to be set, but they are empty")
+				}
+
+				if tc.expectLDFlags && len(export.LDFLAGS) == 0 {
+					t.Error("Expected LDFLAGS to be set, but they are empty")
+				}
+
+				// Check for specific flags
+				if tc.expectCCFlags {
+					hasSysroot := false
+					hasResourceDir := false
+
+					for _, flag := range export.CCFLAGS {
+						if len(flag) >= len(sysrootPrefix) && flag[:len(sysrootPrefix)] == sysrootPrefix {
+							hasSysroot = true
+						}
+						if len(flag) >= len(resourceDirPrefix) && flag[:len(resourceDirPrefix)] == resourceDirPrefix {
+							hasResourceDir = true
+						}
+					}
+
+					if !hasSysroot {
+						t.Error("Missing --sysroot flag in CCFLAGS")
+					}
+					if !hasResourceDir {
+						t.Error("Missing -resource-dir flag in CCFLAGS")
+					}
+				}
+
+				if tc.expectCFlags {
+					hasInclude := false
+
+					for _, flag := range export.CFLAGS {
+						if len(flag) >= len(includePrefix) && flag[:len(includePrefix)] == includePrefix {
+							hasInclude = true
+						}
+					}
+
+					if !hasInclude {
+						t.Error("Missing -I flag in CFLAGS")
+					}
+				}
+
+				if tc.expectLDFlags {
+					hasLib := false
+
+					for _, flag := range export.LDFLAGS {
+						if len(flag) >= len(libPrefix) && flag[:len(libPrefix)] == libPrefix {
+							hasLib = true
+						}
+					}
+
+					if !hasLib {
+						t.Error("Missing -L flag in LDFLAGS")
+					}
+				}
+			} else {
+				if len(export.CCFLAGS) != 0 || len(export.CFLAGS) != 0 || len(export.LDFLAGS) != 0 {
+					t.Errorf("Expected empty export, got CCFLAGS=%v, CFLAGS=%v, LDFLAGS=%v",
+						export.CCFLAGS, export.CFLAGS, export.LDFLAGS)
+				}
+			}
+		})
+	}
+}