Make it possible to run tests

TODO.md

@@ -2,6 +2,7 @@
 
 ## General
 
+- [ ] Run a specific test if the cursor is within a test function when double ctrl-space is pressed.
 - [ ] Change the cursor color when it is past 80 lines (or the set wrap width).
 - [ ] Let the status bar be toggled by the ctrl-o menu. Let ctrl-g when not on a definition do something useful, like cycle indenting a block 0 to 7 indentations.
 - [ ] When opening `file.txt+7`, only assume that 7 is the line number if no file named `file.txt+7` exists, but `file.txt` exists.

v2/run.go

@@ -52,7 +52,12 @@ func (e *Editor) Run() (string, bool, error) {
 		jarName := e.exeName(sourceFilename, false) + ".jar"
 		cmd = exec.Command("java", "-jar", jarName)
 	case mode.Go:
-		cmd = exec.Command("go", "run", sourceFilename)
+		if strings.HasSuffix(sourceFilename, "_test.go") {
+			// TODO: go test . -run NameOfTest and fetch NameOfTest from the test function that the cursor is within, if available
+			cmd = exec.Command("go", "test", ".")
+		} else {
+			cmd = exec.Command("go", "run", sourceFilename)
+		}
 	case mode.Lilypond:
 		ext := filepath.Ext(sourceFilename)
 		firstName := strings.TrimSuffix(filepath.Base(sourceFilename), ext)