aae5d21ad4
TestWASMBinarySize builds WASM with -ldflags="-s -w", gzips the binary, and asserts < 1MB gzip (842KB actual) and < 3MB raw (2.90MB actual). Skipped in -short mode. Matches Makefile WASM_GZ_LIMIT. Co-Authored-By: Virgil <virgil@lethean.io>
52 lines
1.2 KiB
Go
52 lines
1.2 KiB
Go
// SPDX-Licence-Identifier: EUPL-1.2
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//go:build !js
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package main
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import (
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"bytes"
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"compress/gzip"
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"os"
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"os/exec"
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"path/filepath"
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"testing"
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"github.com/stretchr/testify/assert"
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"github.com/stretchr/testify/require"
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)
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const (
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wasmGzLimit = 1_048_576 // 1 MB gzip transfer size limit
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wasmRawLimit = 3_145_728 // 3 MB raw size limit
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)
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func TestWASMBinarySize_Good(t *testing.T) {
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if testing.Short() {
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t.Skip("skipping WASM build test in short mode")
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}
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dir := t.TempDir()
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out := filepath.Join(dir, "gohtml.wasm")
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cmd := exec.Command("go", "build", "-ldflags=-s -w", "-o", out, ".")
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cmd.Env = append(os.Environ(), "GOOS=js", "GOARCH=wasm")
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output, err := cmd.CombinedOutput()
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require.NoError(t, err, "WASM build failed: %s", output)
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raw, err := os.ReadFile(out)
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require.NoError(t, err)
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var buf bytes.Buffer
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gz, err := gzip.NewWriterLevel(&buf, gzip.BestCompression)
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require.NoError(t, err)
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_, err = gz.Write(raw)
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require.NoError(t, err)
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require.NoError(t, gz.Close())
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t.Logf("WASM size: %d bytes raw, %d bytes gzip", len(raw), buf.Len())
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assert.Less(t, buf.Len(), wasmGzLimit,
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"WASM gzip size %d exceeds 1MB limit", buf.Len())
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assert.Less(t, len(raw), wasmRawLimit,
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"WASM raw size %d exceeds 3MB limit", len(raw))
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}
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