Add initial search tests

m/search_test.go

@@ -0,0 +1,86 @@
+package m
+
+import (
+	"strings"
+	"testing"
+
+	"github.com/walles/moar/twin"
+)
+
+// Create a pager with three screen lines reading from a six lines stream
+func createThreeLinesPager(t *testing.T) *Pager {
+	reader := NewReaderFromStream("", strings.NewReader("a\nb\nc\nd\ne\nf\n"))
+	if err := reader._wait(); err != nil {
+		panic(err)
+	}
+
+	screen := twin.NewFakeScreen(20, 3)
+	pager := NewPager(reader)
+
+	pager.screen = screen
+
+	if pager.mode != _Viewing {
+		t.Errorf("Expected initial pager state to be %v but got %v", _Viewing, pager.mode)
+	}
+
+	return pager
+}
+
+func TestScrollToNextSearchHit_StartAtBottom(t *testing.T) {
+	// Create a pager scrolled to the last line
+	pager := createThreeLinesPager(t)
+	pager.scrollToEnd()
+
+	// Set the search to something that doesn't exist in this pager
+	pager.searchString = "xxx"
+	pager.searchPattern = toPattern(pager.searchString)
+
+	// Scroll to the next search hit
+	pager.scrollToNextSearchHit()
+
+	if pager.mode != _NotFound {
+		t.Errorf("Expected state %v but got %v", _NotFound, pager.mode)
+	}
+}
+
+func TestScrollToNextSearchHit_StartAtTop(t *testing.T) {
+	// Create a pager scrolled to the first line
+	pager := createThreeLinesPager(t)
+
+	// Set the search to something that doesn't exist in this pager
+	pager.searchString = "xxx"
+	pager.searchPattern = toPattern(pager.searchString)
+
+	// Scroll to the next search hit
+	pager.scrollToNextSearchHit()
+
+	if pager.mode != _NotFound {
+		t.Errorf("Expected state %v but got %v", _NotFound, pager.mode)
+	}
+}
+
+func TestScrollToNextSearchHit_WrapAfterNotFound(t *testing.T) {
+	// Create a pager scrolled to the last line
+	pager := createThreeLinesPager(t)
+	pager.scrollToEnd()
+
+	// Search for "a", it's on the first line (ref createThreeLinesPager())
+	pager.searchString = "a"
+	pager.searchPattern = toPattern(pager.searchString)
+
+	// Scroll to the next search hit, this should take us into _NotFound
+	pager.scrollToNextSearchHit()
+	if pager.mode != _NotFound {
+		t.Errorf("Expected state %v but got %v", _NotFound, pager.mode)
+	}
+
+	// Scroll to the next search hit, this should wrap the search and take us to
+	// the top
+	pager.scrollToNextSearchHit()
+	if pager.mode != _Viewing {
+		t.Errorf("Expected state %v but got %v", _Viewing, pager.mode)
+	}
+	if pager.lineNumberOneBased() != 1 {
+		t.Errorf("Expected line number %v but got %v", 1, pager.lineNumberOneBased())
+	}
+}