Enhance CI workflow with coverage options and add tests for KDTree functionality

.github/workflows/ci.yml

@@ -44,12 +44,15 @@ jobs:
         run: |
           set -e
           for pkg in $(go list ./...); do
-            if go test -list '^Fuzz' "$pkg" | grep -q '^Fuzz'; then
-              echo "==> Fuzzing $pkg for 10s"
-              go test -run=NONE -fuzz=Fuzz -fuzztime=10s "$pkg"
-            else
+            FUZZES=$(go test -list '^Fuzz' "$pkg" | grep '^Fuzz' || true)
+            if [ -z "$FUZZES" ]; then
               echo "==> Skipping $pkg (no fuzz targets)"
+              continue
             fi
+            for fz in $FUZZES; do
+              echo "==> Fuzzing $pkg :: $fz for 10s"
+              go test -run=NONE -fuzz="^$fz$" -fuzztime=10s "$pkg"
+            done
           done
 
       - name: Upload coverage artifact

Makefile

@@ -73,14 +73,17 @@ coverhtml: cover ## Generate HTML coverage report at $(COVERHTML)
 .PHONY: fuzz
 fuzz: ## Run Go fuzz tests for $(FUZZTIME)
 	@set -e; \
-	PKGS="$$( $(GO) list ./... )"; \
+	PKGS="$$($(GO) list ./...)"; \
 	for pkg in $$PKGS; do \
-	  if $(GO) test -list '^Fuzz' $$pkg | grep -q '^Fuzz'; then \
-	    echo "==> Fuzzing $$pkg for $(FUZZTIME)"; \
-	    $(GO) test -run=NONE -fuzz=Fuzz -fuzztime=$(FUZZTIME) $$pkg; \
-	  else \
+	  FUZZES="$$($(GO) test -list '^Fuzz' $$pkg | grep '^Fuzz' || true)"; \
+	  if [ -z "$$FUZZES" ]; then \
 	    echo "==> Skipping $$pkg (no fuzz targets)"; \
+	    continue; \
 	  fi; \
+	  for fz in $$FUZZES; do \
+	    echo "==> Fuzzing $$pkg :: $$fz for $(FUZZTIME)"; \
+	    $(GO) test -run=NONE -fuzz="^$$fz$" -fuzztime=$(FUZZTIME) $$pkg; \
+	  done; \
 	done
 
 .PHONY: bench

kdtree_morecov_test.go

@@ -48,7 +48,7 @@ func TestDeleteByID_SwapDelete(t *testing.T) {
 	if ids["B"] {
 		t.Fatalf("B should not be present after delete")
 	}
-	if !(ids["A"] || ids["C"]) {
+	if !ids["A"] && !ids["C"] {
 		t.Fatalf("expected either A or C to be nearest for respective queries: %v", ids)
 	}
 }