nlohmann-json: Add ptest support

* Backport 2 patches [1] [2] to fix the build failure under tests dir.

* Fetch the test data during do_fetch phase to avoid internet access
during test as some tests need test data.
 # ./run-ptest
PASS: test-algorithms_cpp11
PASS: test-allocator_cpp11
PASS: test-alt-string_cpp11
PASS: test-assert_macro_cpp11
PASS: test-binary_formats_cpp11
[snip]
PASS: test-unicode5_cpp11
PASS: test-user_defined_input_cpp11
PASS: test-windows_h_cpp11
PASS: test-wstring_cpp11

[1] https://github.com/nlohmann/json/commit/6cec5aefc97ad219b6fd5a4132f88f7c8f6800ee
[2] https://github.com/nlohmann/json/commit/660d0b58565073975d6f5d94365d6cbf150a4cf8

Signed-off-by: Mingli Yu <mingli.yu@windriver.com>
Signed-off-by: Khem Raj <raj.khem@gmail.com>

3 files changed, 104 insertions, 0 deletions

diff --git a/meta-oe/recipes-devtools/nlohmann-json/files/0001-custom-allocators-define-missing-rebind-type-3895.patch b/meta-oe/recipes-devtools/nlohmann-json/files/0001-custom-allocators-define-missing-rebind-type-3895.patch
new file mode 100644
index 0000000000..d964586c1c
--- /dev/null
+++ b/meta-oe/recipes-devtools/nlohmann-json/files/0001-custom-allocators-define-missing-rebind-type-3895.patch
@@ -0,0 +1,61 @@
+From 6cec5aefc97ad219b6fd5a4132f88f7c8f6800ee Mon Sep 17 00:00:00 2001
+From: Sergei Trofimovich <slyich@gmail.com>
+Date: Wed, 8 Mar 2023 11:31:56 +0000
+Subject: [PATCH] custom allocators: define missing 'rebind' type (#3895)
+
+Upstream-Status: Backport [https://github.com/nlohmann/json/commit/6cec5aefc97ad219b6fd5a4132f88f7c8f6800ee]
+
+Signed-off-by: Mingli Yu <mingli.yu@windriver.com>
+---
+ tests/src/unit-allocator.cpp   | 9 +++++++++
+ tests/src/unit-regression2.cpp | 9 +++++++++
+ 2 files changed, 18 insertions(+)
+
+diff --git a/tests/src/unit-allocator.cpp b/tests/src/unit-allocator.cpp
+index 76e3b03f..f2e63552 100644
+--- a/tests/src/unit-allocator.cpp
++++ b/tests/src/unit-allocator.cpp
+@@ -20,11 +20,20 @@ struct bad_allocator : std::allocator<T>
+ {
+     using std::allocator<T>::allocator;
+ 
++    bad_allocator() = default;
++    template<class U> bad_allocator(const bad_allocator<U>& /*unused*/) { }
++
+     template<class... Args>
+     void construct(T* /*unused*/, Args&& ... /*unused*/)
+     {
+         throw std::bad_alloc();
+     }
++
++    template <class U>
++    struct rebind
++    {
++        using other = bad_allocator<U>;
++    };
+ };
+ } // namespace
+ 
+diff --git a/tests/src/unit-regression2.cpp b/tests/src/unit-regression2.cpp
+index 2bb9b32e..dbafb436 100644
+--- a/tests/src/unit-regression2.cpp
++++ b/tests/src/unit-regression2.cpp
+@@ -189,6 +189,15 @@ class my_allocator : public std::allocator<T>
+ {
+   public:
+     using std::allocator<T>::allocator;
++
++    my_allocator() = default;
++    template<class U> my_allocator(const my_allocator<U>& /*unused*/) { }
++
++    template <class U>
++    struct rebind
++    {
++        using other = my_allocator<U>;
++    };
+ };
+ 
+ /////////////////////////////////////////////////////////////////////
+-- 
+2.25.1
+
diff --git a/meta-oe/recipes-devtools/nlohmann-json/files/0001-tests-unit-iterators2-use-std-ranges-equals-for-rang.patch b/meta-oe/recipes-devtools/nlohmann-json/files/0001-tests-unit-iterators2-use-std-ranges-equals-for-rang.patch
new file mode 100644
index 0000000000..463912e4b6
--- /dev/null
+++ b/meta-oe/recipes-devtools/nlohmann-json/files/0001-tests-unit-iterators2-use-std-ranges-equals-for-rang.patch
@@ -0,0 +1,31 @@
+From 660d0b58565073975d6f5d94365d6cbf150a4cf8 Mon Sep 17 00:00:00 2001
+From: =?UTF-8?q?Arsen=20Arsenovi=C4=87?= <arsen@aarsen.me>
+Date: Sun, 5 Mar 2023 14:11:22 +0100
+Subject: [PATCH] tests/unit-iterators2: use std::ranges::equals for range
+ comparisons (#3950)
+
+Closes https://github.com/nlohmann/json/issues/3927
+
+Upstream-Status: Backport [https://github.com/nlohmann/json/commit/660d0b58565073975d6f5d94365d6cbf150a4cf8]
+
+Signed-off-by: Mingli Yu <mingli.yu@windriver.com>
+---
+ tests/src/unit-iterators2.cpp | 2 +-
+ 1 file changed, 1 insertion(+), 1 deletion(-)
+
+diff --git a/tests/src/unit-iterators2.cpp b/tests/src/unit-iterators2.cpp
+index 27926084..72a5d9dc 100644
+--- a/tests/src/unit-iterators2.cpp
++++ b/tests/src/unit-iterators2.cpp
+@@ -943,7 +943,7 @@ TEST_CASE("iterators 2")
+                 json j_expected{5, 4, 3, 2, 1};
+ 
+                 auto reversed = j | std::views::reverse;
+-                CHECK(reversed == j_expected);
++                CHECK(std::ranges::equal(reversed, j_expected));
+             }
+ 
+             SECTION("transform")
+-- 
+2.25.1
+
diff --git a/meta-oe/recipes-devtools/nlohmann-json/files/run-ptest b/meta-oe/recipes-devtools/nlohmann-json/files/run-ptest
new file mode 100755
index 0000000000..2f00267d50
--- /dev/null
+++ b/meta-oe/recipes-devtools/nlohmann-json/files/run-ptest
@@ -0,0 +1,12 @@
+#!/bin/sh
+
+cd tests
+for atest in test-* ; do
+    rm -rf tests.log
+    ./${atest} > tests.log 2>&1
+    if [ $? = 0 ] ; then
+        echo "PASS: ${atest}"
+    else
+        echo "FAIL: ${atest}"
+    fi
+done