diff options
Diffstat (limited to 'internal/showcase/rank_history_svg_test.go')
| -rw-r--r-- | internal/showcase/rank_history_svg_test.go | 28 |
1 files changed, 27 insertions, 1 deletions
diff --git a/internal/showcase/rank_history_svg_test.go b/internal/showcase/rank_history_svg_test.go index 06aab4c..d086a7d 100644 --- a/internal/showcase/rank_history_svg_test.go +++ b/internal/showcase/rank_history_svg_test.go @@ -16,7 +16,7 @@ func makeTestSummaries() []ProjectSummary { {Spot: 2, Anchor: "1w", SnapshotDate: "2026-05-20"}, {Spot: 2, Anchor: "2w", SnapshotDate: "2026-05-13"}, {Spot: 3, Anchor: "3w", SnapshotDate: "2026-05-06"}, - {Spot: 0, Anchor: "4w"}, // missing snapshot week + {Spot: 4, Anchor: "4w", SnapshotDate: "2026-04-29"}, // oldest data point }, }, { @@ -239,6 +239,32 @@ func TestGenerateRankHistorySVG_PartialRankHistory(t *testing.T) { require(strings.Contains(svg, `"name":"single-entry"`), "SVG should include 'single-entry' project") } +// TestXLabelStep_ReturnsSensibleSteps verifies the X-axis label density +// function thins out labels as the number of display columns grows. +func TestXLabelStep_ReturnsSensibleSteps(t *testing.T) { + t.Parallel() + + tests := []struct { + displayPoints int + wantMax int // step must be ≤ wantMax + }{ + {5, 1}, + {10, 2}, + {20, 4}, + {32, 8}, + } + + for _, tc := range tests { + got := xLabelStep(tc.displayPoints) + if got > tc.wantMax { + t.Errorf("xLabelStep(%d) = %d, want ≤ %d", tc.displayPoints, got, tc.wantMax) + } + if got <= 0 { + t.Errorf("xLabelStep(%d) = %d, want > 0", tc.displayPoints, got) + } + } +} + // TestGridStep_ReturnsSensibleSteps ensures the Y-axis step function keeps // the graph legible across various project counts. func TestGridStep_ReturnsSensibleSteps(t *testing.T) { |