[wasm] Add support for import section.

test/unittests/wasm/wasm-macro-gen-unittest.cc

Index: test/unittests/wasm/wasm-macro-gen-unittest.cc
diff --git a/test/unittests/wasm/wasm-macro-gen-unittest.cc b/test/unittests/wasm/wasm-macro-gen-unittest.cc
index c5bb5eca008464051ac6417118408d1580780ec4..f3f604b3edc77ee07d576fd2f8427fcad104f047 100644
--- a/test/unittests/wasm/wasm-macro-gen-unittest.cc
+++ b/test/unittests/wasm/wasm-macro-gen-unittest.cc
@@ -131,15 +131,25 @@ TEST_F(WasmMacroGenTest, Expressions) {
   EXPECT_SIZE(6, WASM_LOOP(3, WASM_NOP, WASM_NOP, WASM_ZERO));
 }
 
-
-TEST_F(WasmMacroGenTest, FunctionCalls) {
+TEST_F(WasmMacroGenTest, CallFunction) {
   EXPECT_SIZE(2, WASM_CALL_FUNCTION0(0));
   EXPECT_SIZE(2, WASM_CALL_FUNCTION0(1));
   EXPECT_SIZE(2, WASM_CALL_FUNCTION0(11));
 
   EXPECT_SIZE(4, WASM_CALL_FUNCTION(0, WASM_ZERO));
   EXPECT_SIZE(6, WASM_CALL_FUNCTION(1, WASM_ZERO, WASM_ZERO));
+}
+
+TEST_F(WasmMacroGenTest, CallImport) {
+  EXPECT_SIZE(2, WASM_CALL_IMPORT0(0));
+  EXPECT_SIZE(2, WASM_CALL_IMPORT0(1));
+  EXPECT_SIZE(2, WASM_CALL_IMPORT0(11));
+
+  EXPECT_SIZE(4, WASM_CALL_IMPORT(0, WASM_ZERO));
+  EXPECT_SIZE(6, WASM_CALL_IMPORT(1, WASM_ZERO, WASM_ZERO));
+}
 
+TEST_F(WasmMacroGenTest, CallIndirect) {
   EXPECT_SIZE(4, WASM_CALL_INDIRECT0(0, WASM_ZERO));
   EXPECT_SIZE(4, WASM_CALL_INDIRECT0(1, WASM_ZERO));
   EXPECT_SIZE(4, WASM_CALL_INDIRECT0(11, WASM_ZERO));