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random testing

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This commit is contained in:
David Allemang
2024-03-04 16:18:06 -05:00
parent 7b25c31918
commit 36f8b3d65b
4 changed files with 78 additions and 113 deletions
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61
build.zig
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@@ -1,33 +1,11 @@
const std = @import("std");
// Although this function looks imperative, note that its job is to
// declaratively construct a build graph that will be executed by an external
// runner.
pub fn build(b: *std.Build) void {
// Standard target options allows the person running `zig build` to choose
// what target to build for. Here we do not override the defaults, which
// means any target is allowed, and the default is native. Other options
// for restricting supported target set are available.
const target = b.standardTargetOptions(.{});
// Standard optimization options allow the person running `zig build` to select
// between Debug, ReleaseSafe, ReleaseFast, and ReleaseSmall. Here we do not
// set a preferred release mode, allowing the user to decide how to optimize.
const optimize = b.standardOptimizeOption(.{});
const opts = .{ .target = target, .optimize = optimize };
const lib = b.addStaticLibrary(.{
.name = "learnzig",
// In this case the main source file is merely a path, however, in more
// complicated build scripts, this could be a generated file.
.root_source_file = .{ .path = "src/root.zig" },
.target = target,
.optimize = optimize,
});
// This declares intent for the library to be installed into the standard
// location when the user invokes the "install" step (the default step when
// running `zig build`).
b.installArtifact(lib);
const json = b.dependency("json", opts).module("json");
const exe = b.addExecutable(.{
.name = "learnzig",
@@ -35,57 +13,24 @@ pub fn build(b: *std.Build) void {
.target = target,
.optimize = optimize,
});
// This declares intent for the executable to be installed into the
// standard location when the user invokes the "install" step (the default
// step when running `zig build`).
exe.root_module.addImport("json", json);
b.installArtifact(exe);
// This *creates* a Run step in the build graph, to be executed when another
// step is evaluated that depends on it. The next line below will establish
// such a dependency.
const run_cmd = b.addRunArtifact(exe);
// By making the run step depend on the install step, it will be run from the
// installation directory rather than directly from within the cache directory.
// This is not necessary, however, if the application depends on other installed
// files, this ensures they will be present and in the expected location.
run_cmd.step.dependOn(b.getInstallStep());
// This allows the user to pass arguments to the application in the build
// command itself, like this: `zig build run -- arg1 arg2 etc`
if (b.args) |args| {
run_cmd.addArgs(args);
}
// This creates a build step. It will be visible in the `zig build --help` menu,
// and can be selected like this: `zig build run`
// This will evaluate the `run` step rather than the default, which is "install".
const run_step = b.step("run", "Run the app");
run_step.dependOn(&run_cmd.step);
// Creates a step for unit testing. This only builds the test executable
// but does not run it.
const lib_unit_tests = b.addTest(.{
.root_source_file = .{ .path = "src/root.zig" },
.target = target,
.optimize = optimize,
});
const run_lib_unit_tests = b.addRunArtifact(lib_unit_tests);
const exe_unit_tests = b.addTest(.{
.root_source_file = .{ .path = "src/main.zig" },
.target = target,
.optimize = optimize,
});
const run_exe_unit_tests = b.addRunArtifact(exe_unit_tests);
// Similar to creating the run step earlier, this exposes a `test` step to
// the `zig build --help` menu, providing a way for the user to request
// running the unit tests.
const test_step = b.step("test", "Run unit tests");
test_step.dependOn(&run_lib_unit_tests.step);
test_step.dependOn(&run_exe_unit_tests.step);
}

34
build.zig.zon
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@@ -15,37 +15,11 @@
// Once all dependencies are fetched, `zig build` no longer requires
// internet connectivity.
.dependencies = .{
// See `zig fetch --save <url>` for a command-line interface for adding dependencies.
//.example = .{
// // When updating this field to a new URL, be sure to delete the corresponding
// // `hash`, otherwise you are communicating that you expect to find the old hash at
// // the new URL.
// .url = "https://example.com/foo.tar.gz",
//
// // This is computed from the file contents of the directory of files that is
// // obtained after fetching `url` and applying the inclusion rules given by
// // `paths`.
// //
// // This field is the source of truth; packages do not come from a `url`; they
// // come from a `hash`. `url` is just one of many possible mirrors for how to
// // obtain a package matching this `hash`.
// //
// // Uses the [multihash](https://multiformats.io/multihash/) format.
// .hash = "...",
//
// // When this is provided, the package is found in a directory relative to the
// // build root. In this case the package's hash is irrelevant and therefore not
// // computed. This field and `url` are mutually exclusive.
// .path = "foo",
//},
.json = .{
.url = "git+https://github.com/getty-zig/json.git#main",
.hash = "1220a6a7706fa609ce63e2bf61812515f6ab45273397ca591f925a32e7e507cb7cec",
},
},
// Specifies the set of files and directories that are included in this package.
// Only files and directories listed here are included in the `hash` that
// is computed for this package.
// Paths are relative to the build root. Use the empty string (`""`) to refer to
// the build root itself.
// A directory listed here means that all files within, recursively, are included.
.paths = .{
// This makes *all* files, recursively, included in this package. It is generally
// better to explicitly list the files and directories instead, to insure that

86
src/main.zig
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@@ -1,24 +1,80 @@
const std = @import("std");
const json = @import("json");
fn concat(ally: std.mem.Allocator, u: []const u8, v: []const u8) ![]const u8 {
const res = try ally.alloc(u8, u.len + v.len);
@memcpy(res[0..u.len], u);
@memcpy(res[u.len .. u.len + v.len], v);
return res;
}
const Shape = union(enum) {
rect: struct { w: f32, h: f32 },
square: struct { s: f32 },
circle: struct { r: f32 },
};
fn show(shape: Shape) void {
var gpa = std.heap.GeneralPurposeAllocator(.{}){};
const all = gpa.allocator();
const text = json.toSlice(all, shape) catch unreachable;
defer all.free(text);
std.debug.print("shape: {s}\n", .{text});
// switch (shape) {
// Shape.rect => |r| std.debug.print("rect: {} x {}\n", .{ r.w, r.h }),
// Shape.square => |s| std.debug.print("square: {}\n", .{s.s}),
// Shape.circle => |c| std.debug.print("circle: {}\n", .{c.r}),
// }
}
const Point = struct {
x: i32,
y: i32,
};
pub fn main() !void {
// Prints to stderr (it's a shortcut based on `std.io.getStdErr()`)
std.debug.print("All your {s} are belong to us.\n", .{"codebase"});
var big_buf: [1 << 20]u8 = undefined; // 1 MB
var fixed = std.heap.FixedBufferAllocator.init(&big_buf);
const ally = fixed.allocator();
// stdout is for the actual output of your application, for example if you
// are implementing gzip, then only the compressed bytes should be sent to
// stdout, not any debugging messages.
const stdout_file = std.io.getStdOut().writer();
var bw = std.io.bufferedWriter(stdout_file);
const stdout = bw.writer();
var s: Shape = Shape{ .circle = .{ .r = 99 } };
show(s);
s = Shape{ .rect = .{ .w = 1, .h = 2 } };
show(s);
try stdout.print("Run `zig build test` to run the tests.\n", .{});
const val = Point{ .x = 1, .y = 2 };
const ser = try json.toSlice(ally, val);
defer ally.free(ser);
try bw.flush(); // don't forget to flush!
std.debug.print("{s}\n", .{ser});
const deser = try json.fromSlice(ally, Point, ser);
std.debug.print("{any}\n", .{deser});
var hash_map = std.StringArrayHashMap([]const u8).init(ally);
defer hash_map.deinit();
try hash_map.put("foo", "bar");
try hash_map.put("fizz", "buzz");
try hash_map.put("qux", "quxx");
const x = try concat(ally, hash_map.get("fizz").?, hash_map.get("foo").?);
defer ally.free(x);
std.debug.print("x={s}\n", .{x});
var iter = hash_map.iterator();
while (iter.next()) |it| {
std.debug.print("{s} {s}\n", .{ it.key_ptr.*, it.value_ptr.* });
}
}
test "simple test" {
var list = std.ArrayList(i32).init(std.testing.allocator);
defer list.deinit(); // try commenting this out and see if zig detects the memory leak!
try list.append(42);
try std.testing.expectEqual(@as(i32, 42), list.pop());
test concat {
const x = "hello";
const y = "world";
const z = try concat(std.testing.allocator, x, y);
defer std.testing.allocator.free(z);
try std.testing.expectEqualStrings(z, "helloworld");
}

10
src/root.zig
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@@ -1,10 +0,0 @@
const std = @import("std");
const testing = std.testing;
export fn add(a: i32, b: i32) i32 {
return a + b;
}
test "basic add functionality" {
try testing.expect(add(3, 7) == 10);
}