Split config check test for different scenarios

Author: MilanGarnier

tests/ext/distributed_tracing/propagation_behavior_extract_config.phpt

@@ -0,0 +1,23 @@
+--TEST--
+DD_TRACE_PROPAGATION_BEHAVIOR_EXTRACT: invalid value falls back to continue
+--ENV--
+DD_TRACE_GENERATE_ROOT_SPAN=0
+DD_TRACE_PROPAGATION_BEHAVIOR_EXTRACT=invalid_value
+--FILE--
+<?php
+
+DDTrace\consume_distributed_tracing_headers([
+    "x-datadog-trace-id" => 42,
+    "x-datadog-parent-id" => 10,
+]);
+
+$span = DDTrace\start_span();
+$root = DDTrace\root_span();
+
+// invalid value falls back to default (continue): inherits upstream trace id
+echo "same_as_upstream: " . ($root->traceId === "0000000000000000000000000000002a" ? "yes" : "no") . "\n";
+
+DDTrace\close_span();
+?>
+--EXPECT--
+same_as_upstream: yes

tests/ext/distributed_tracing/propagation_behavior_extract_config_invalid_fallback.phpt

@@ -0,0 +1,24 @@
+--TEST--
+DD_TRACE_PROPAGATION_BEHAVIOR_EXTRACT: Ignore (mixed case) is accepted
+--ENV--
+DD_TRACE_GENERATE_ROOT_SPAN=0
+DD_TRACE_PROPAGATION_BEHAVIOR_EXTRACT=Ignore
+--FILE--
+<?php
+
+DDTrace\consume_distributed_tracing_headers([
+    "x-datadog-trace-id" => 42,
+    "x-datadog-parent-id" => 10,
+]);
+
+$span = DDTrace\start_span();
+$root = DDTrace\root_span();
+
+echo "same_as_upstream: " . ($root->traceId === "0000000000000000000000000000002a" ? "yes" : "no") . "\n";
+echo "links_count: " . count($root->links) . "\n";
+
+DDTrace\close_span();
+?>
+--EXPECT--
+same_as_upstream: no
+links_count: 0

tests/ext/distributed_tracing/propagation_behavior_extract_config_mixedcase_ignore.phpt

@@ -0,0 +1,22 @@
+--TEST--
+DD_TRACE_PROPAGATION_BEHAVIOR_EXTRACT: CONTINUE (uppercase) is accepted
+--ENV--
+DD_TRACE_GENERATE_ROOT_SPAN=0
+DD_TRACE_PROPAGATION_BEHAVIOR_EXTRACT=CONTINUE
+--FILE--
+<?php
+
+DDTrace\consume_distributed_tracing_headers([
+    "x-datadog-trace-id" => 42,
+    "x-datadog-parent-id" => 10,
+]);
+
+$span = DDTrace\start_span();
+$root = DDTrace\root_span();
+
+echo "same_as_upstream: " . ($root->traceId === "0000000000000000000000000000002a" ? "yes" : "no") . "\n";
+
+DDTrace\close_span();
+?>
+--EXPECT--
+same_as_upstream: yes

tests/ext/distributed_tracing/propagation_behavior_extract_config_uppercase_continue.phpt

@@ -0,0 +1,24 @@
+--TEST--
+DD_TRACE_PROPAGATION_BEHAVIOR_EXTRACT: RESTART (uppercase) is accepted
+--ENV--
+DD_TRACE_GENERATE_ROOT_SPAN=0
+DD_TRACE_PROPAGATION_BEHAVIOR_EXTRACT=RESTART
+--FILE--
+<?php
+
+DDTrace\consume_distributed_tracing_headers([
+    "x-datadog-trace-id" => 42,
+    "x-datadog-parent-id" => 10,
+]);
+
+$span = DDTrace\start_span();
+$root = DDTrace\root_span();
+
+echo "same_as_upstream: " . ($root->traceId === "0000000000000000000000000000002a" ? "yes" : "no") . "\n";
+echo "links_count: " . count($root->links) . "\n";
+
+DDTrace\close_span();
+?>
+--EXPECT--
+same_as_upstream: no
+links_count: 1