Highlight ExUnit assert/refute functions and macros (#225)

* highlight ExUnit assert/refute functions and macros
* add syntax highlight tests for ExUnit macro/functions support

Author: gasparch

spec/syntax/exunit_spec.rb

@@ -44,4 +44,123 @@
     end
     EOF
   end
+
+  it 'on_exit macro' do
+    expect(<<~EOF).to include_elixir_syntax('elixirExUnitMacro', 'on_exit')
+    setup_all do
+      IO.puts "hi mom"
+      on_exit fn() ->
+        do_something
+      end
+    end
+
+    test 'that stuff works' do
+      assert true
+    end
+    EOF
+  end
+
+  it 'assert' do
+    expect(<<~EOF).to include_elixir_syntax('elixirExUnitAssert', 'assert')
+    test 'that stuff works' do
+      assert true
+    end
+    EOF
+  end
+
+  it 'assert_in_delta' do
+    expect(<<~EOF).to include_elixir_syntax('elixirExUnitAssert', 'assert_in_delta')
+    test 'that stuff works' do
+      assert_in_delta true
+    end
+    EOF
+  end
+
+  it 'assert_raise' do
+    expect(<<~EOF).to include_elixir_syntax('elixirExUnitAssert', 'assert_raise')
+    test 'that stuff works' do
+      assert_raise true
+    end
+    EOF
+  end
+
+  it 'assert_receive' do
+    expect(<<~EOF).to include_elixir_syntax('elixirExUnitAssert', 'assert_receive')
+    test 'that stuff works' do
+      assert_receive true
+    end
+    EOF
+  end
+
+  it 'assert_received' do
+    expect(<<~EOF).to include_elixir_syntax('elixirExUnitAssert', 'assert_received')
+    test 'that stuff works' do
+      assert_received true
+    end
+    EOF
+  end
+
+  it 'catch_error' do
+    expect(<<~EOF).to include_elixir_syntax('elixirExUnitAssert', 'catch_error')
+    test 'that stuff works' do
+      catch_error true
+    end
+    EOF
+  end
+
+  it 'catch_exit' do
+    expect(<<~EOF).to include_elixir_syntax('elixirExUnitAssert', 'catch_exit')
+    test 'that stuff works' do
+      catch_exit true
+    end
+    EOF
+  end
+
+  it 'catch_throw' do
+    expect(<<~EOF).to include_elixir_syntax('elixirExUnitAssert', 'catch_throw')
+    test 'that stuff works' do
+      catch_throw true
+    end
+    EOF
+  end
+
+  it 'flunk' do
+    expect(<<~EOF).to include_elixir_syntax('elixirExUnitAssert', 'flunk')
+    test 'that stuff works' do
+      flunk true
+    end
+    EOF
+  end
+
+  it 'refute' do
+    expect(<<~EOF).to include_elixir_syntax('elixirExUnitAssert', 'refute')
+    test 'that stuff works' do
+      refute true
+    end
+    EOF
+  end
+
+  it 'refute_in_delta' do
+    expect(<<~EOF).to include_elixir_syntax('elixirExUnitAssert', 'refute_in_delta')
+    test 'that stuff works' do
+      refute_in_delta true
+    end
+    EOF
+  end
+
+  it 'refute_receive' do
+    expect(<<~EOF).to include_elixir_syntax('elixirExUnitAssert', 'refute_receive')
+    test 'that stuff works' do
+      refute_receive true
+    end
+    EOF
+  end
+
+  it 'refute_received' do
+    expect(<<~EOF).to include_elixir_syntax('elixirExUnitAssert', 'refute_received')
+    test 'that stuff works' do
+      refute_received true
+    end
+    EOF
+  end
 end

syntax/elixir.vim

@@ -165,7 +165,9 @@ syn match  elixirExceptionDeclaration   "[^[:space:];#<]\+"        contained con
 syn match  elixirCallbackDeclaration    "[^[:space:];#<,()\[\]]\+" contained contains=elixirFunctionDeclaration             skipwhite skipnl
 
 " ExUnit
-syn match  elixirExUnitMacro "\(^\s*\)\@<=\<\(test\|describe\|setup\|setup_all\)\>"
+syn match  elixirExUnitMacro "\(^\s*\)\@<=\<\(test\|describe\|setup\|setup_all\|on_exit\)\>"
+syn match  elixirExUnitAssert "\(^\s*\)\@<=\<\(assert\|assert_in_delta\|assert_raise\|assert_receive\|assert_received\|catch_error\)\>"
+syn match  elixirExUnitAssert "\(^\s*\)\@<=\<\(catch_exit\|catch_throw\|flunk\|refute\|refute_in_delta\|refute_receive\|refute_received\)\>"
 
 hi def link elixirBlockInline            Keyword
 hi def link elixirBlockDefinition        Keyword
@@ -191,6 +193,7 @@ hi def link elixirInclude                Include
 hi def link elixirComment                Comment
 hi def link elixirTodo                   Todo
 hi def link elixirKeyword                Keyword
+hi def link elixirExUnitAssert           Keyword
 hi def link elixirOperator               Operator
 hi def link elixirAtom                   Constant
 hi def link elixirPseudoVariable         Constant