Add test for new Go API methods

Co-authored-by: NikolajBjorner <3085284+NikolajBjorner@users.noreply.github.com>

examples/go/test_new_api_additions.go

@@ -0,0 +1,74 @@
+package main
+
+import (
+	"fmt"
+	"os"
+	"path/filepath"
+
+	"github.com/Z3Prover/z3/src/api/go"
+)
+
+func main() {
+	// Test SetInitialValue
+	fmt.Println("\nTesting Solver.SetInitialValue()...")
+	ctx2 := z3.NewContext()
+	solver2 := ctx2.NewSolver()
+
+	x := ctx2.MkIntConst("x")
+	y := ctx2.MkIntConst("y")
+
+	// Set initial values to guide the solver
+	solver2.SetInitialValue(x, ctx2.MkInt(5, ctx2.MkIntSort()))
+	solver2.SetInitialValue(y, ctx2.MkInt(10, ctx2.MkIntSort()))
+
+	// Add constraints
+	solver2.Assert(ctx2.MkGt(x, ctx2.MkInt(0, ctx2.MkIntSort())))
+	solver2.Assert(ctx2.MkGt(y, ctx2.MkInt(0, ctx2.MkIntSort())))
+
+	if solver2.Check() == z3.Satisfiable {
+		fmt.Println("  ✓ SetInitialValue works (solver found solution)")
+	} else {
+		fmt.Println("  ✗ SetInitialValue failed")
+		os.Exit(1)
+	}
+
+	// Test FromString
+	fmt.Println("\nTesting Solver.FromString()...")
+	ctx3 := z3.NewContext()
+	solver3 := ctx3.NewSolver()
+
+	smtString := "(declare-const z Int)(assert (> z 42))"
+	solver3.FromString(smtString)
+
+	if solver3.Check() == z3.Satisfiable {
+		fmt.Println("  ✓ FromString works correctly")
+	} else {
+		fmt.Println("  ✗ FromString failed")
+		os.Exit(1)
+	}
+
+	// Test FromFile
+	fmt.Println("\nTesting Solver.FromFile()...")
+	ctx4 := z3.NewContext()
+	solver4 := ctx4.NewSolver()
+
+	// Create a temporary SMT file
+	tmpDir := os.TempDir()
+	smtFile := filepath.Join(tmpDir, "test.smt2")
+	err := os.WriteFile(smtFile, []byte("(declare-const w Int)\n(assert (< w 100))\n"), 0644)
+	if err != nil {
+		fmt.Printf("  ✗ Failed to create test file: %v\n", err)
+		os.Exit(1)
+	}
+	defer os.Remove(smtFile)
+
+	solver4.FromFile(smtFile)
+	if solver4.Check() == z3.Satisfiable {
+		fmt.Println("  ✓ FromFile works correctly")
+	} else {
+		fmt.Println("  ✗ FromFile failed")
+		os.Exit(1)
+	}
+
+	fmt.Println("\nAll tests passed! ✓")
+}