[dawn][emscripten] Add bare-bone unit testing for Emscripten bindings.

Change-Id: Id950fa83fc3c36e0433e516f96a6c3acbecc1862
Reviewed-on: https://dawn-review.googlesource.com/c/dawn/+/211235
Reviewed-by: Corentin Wallez <[email protected]>
Reviewed-by: Kai Ninomiya <[email protected]>
Commit-Queue: Loko Kung <[email protected]>

Author: lokokung

CMakeLists.txt

@@ -77,12 +77,14 @@ set(USE_WAYLAND OFF)
 set(USE_X11 OFF)
 set(USE_WINDOWS_UI OFF)
 set(BUILD_SAMPLES OFF)
+set(BUILD_TESTS OFF)
 set(TARGET_MACOS OFF)
 if (CMAKE_SYSTEM_NAME MATCHES "Emscripten")
   # Only the samples are supported for Emscripten at the moment.
   # TODO(crbug.com/42240181): Make dawn_end2end_tests work too.
   set(ENABLE_EMSCRIPTEN ON)
   set(BUILD_SAMPLES ON)
+  set(BUILD_TESTS ON)
   set(ENABLE_NULL OFF)
 elseif (WIN32)
   set(ENABLE_D3D11 ON)
@@ -174,6 +176,7 @@ option(DAWN_DXC_ENABLE_ASSERTS_IN_NDEBUG "Enable DXC asserts in non-debug builds
 option(DAWN_TARGET_MACOS "Manually link Apple core frameworks" ${TARGET_MACOS})
 
 option(DAWN_BUILD_SAMPLES "Enables building Dawn's samples" ${BUILD_SAMPLES})
+option(DAWN_BUILD_TESTS "Enables building Dawn's tests" ${BUILD_TESTS})
 option(DAWN_BUILD_NODE_BINDINGS "Enables building Dawn's NodeJS bindings" OFF)
 option(DAWN_ENABLE_SWIFTSHADER "Enables building Swiftshader as part of the build and Vulkan adapter discovery" OFF)
 option(DAWN_BUILD_BENCHMARKS "Build Dawn benchmarks" OFF)
@@ -293,6 +296,7 @@ set_if_not_defined(DAWN_SWIFTSHADER_DIR "${DAWN_THIRD_PARTY_DIR}/swiftshader" "D
 set_if_not_defined(DAWN_PROTOBUF_DIR "${DAWN_THIRD_PARTY_DIR}/protobuf" "Directory in which to find protobuf")
 set_if_not_defined(DAWN_LPM_DIR "${DAWN_THIRD_PARTY_DIR}/libprotobuf-mutator/src" "Directory in which to find libprotobuf")
 set_if_not_defined(DAWN_EMDAWNWEBGPU_DIR "${DAWN_THIRD_PARTY_DIR}/emdawnwebgpu" "Directory in which to find Dawn specific Emscripten bindings")
+set_if_not_defined(DAWN_GOOGLETEST_DIR "${DAWN_THIRD_PARTY_DIR}/googletest" "Directory in which to find googletest")
 
 set_if_not_defined(DAWN_SPIRV_TOOLS_DIR "${DAWN_THIRD_PARTY_DIR}/spirv-tools/src" "Directory in which to find SPIRV-Tools")
 set_if_not_defined(DAWN_SPIRV_HEADERS_DIR "${DAWN_THIRD_PARTY_DIR}/spirv-headers/src" "Directory in which to find SPIRV-Headers")

src/dawn/samples/CMakeLists.txt

@@ -78,6 +78,10 @@ function(Sample)
     if (${DAWN_ENABLE_EMSCRIPTEN})
         set_target_properties(${arg_NAME} PROPERTIES
             SUFFIX ".html")
+        target_link_options(${arg_NAME} PUBLIC
+            # We need JSPI for Future implementation.
+            "-sJSPI"
+        )
     endif()
     target_link_libraries(${arg_NAME} PUBLIC dawn::dawn_sample_utils)
     common_compile_options(${arg_NAME})

src/emdawnwebgpu/CMakeLists.txt

@@ -194,8 +194,6 @@ if (${DAWN_ENABLE_EMSCRIPTEN})
     target_link_options(emdawnwebgpu_config INTERFACE
         # We are using Dawn-generated bindings, not built-in ones
         "-sUSE_WEBGPU=0"
-        # We need Asyncify for Future implementation.
-        "-sASYNCIFY=1"
         # The JS libraries needed for bindings
         "--js-library=${EM_BUILD_GEN_DIR}/library_webgpu_enum_tables.js"
         "--js-library=${EM_BUILD_GEN_DIR}/library_webgpu_generated_struct_info.js"
@@ -220,11 +218,34 @@ if (${DAWN_ENABLE_EMSCRIPTEN})
         ENABLE_EMSCRIPTEN
         HEADER_ONLY
         HEADERS
+            "${EM_BUILD_GEN_DIR}/include/dawn/webgpu_cpp_print.h"
             "${EM_BUILD_GEN_DIR}/include/webgpu/webgpu_cpp.h"
             "${EM_BUILD_GEN_DIR}/include/webgpu/webgpu_cpp_chained_struct.h"
             "${DAWN_INCLUDE_DIR}/webgpu/webgpu_enum_class_bitmasks.h"
         DEPENDS
             emdawnwebgpu_c
     )
 
+    if (${DAWN_BUILD_TESTS})
+        set(emdawnwebgpu_test_sources
+            "tests/FuturesTests.cpp"
+        )
+        add_executable(emdawnwebgpu_tests ${emdawnwebgpu_test_sources})
+        set_target_properties(emdawnwebgpu_tests PROPERTIES
+            SUFFIX ".html")
+        target_link_libraries(
+            emdawnwebgpu_tests
+            PUBLIC
+                dawn::dawn_wgpu_utils
+                emdawnwebgpu_cpp
+                gmock_main
+        )
+        target_link_options(emdawnwebgpu_tests PUBLIC
+            # We need ASYNCIFY for Future implementation. Note that for
+            # some reason, at the moment, these tests do not work with
+            # JSPI.
+            "-sASYNCIFY=1"
+        )
+    endif()
+
 endif()